I bought JV-Contentlinks (and also JV-relatives) for our sites and our sites now have more visitors AND lower bouncerates.
We have quite a large website and because we have, like, "hundreds" of articles with each of our important keywords, Googlebot can easily pick the wrong one as your "best".
This is often referred to as "keyword cannibalism".
JV-contentlinks makes it very easy for you to make the "link juice" flow to the right article, which Google can then easily mark as THE important one.
Also, the support is some of the best I've seen - Vinjay is super!